don't know about either undergrad school, but you can get into temple from whatever undergrad. just do well in school and on the DAT, be involved, and enjoy your undergrad experience.
I went Penn State undergrad and spent almost 2 years at UP. I later went to Temple Dental.
I would not have preferred to spend all 8 years in Philadelphia. The time I spent at PSU/UP was magical! Penn State is a rural, college town. Temple, while trying to improve it's campus, is in the city. It is an unavoidable fact. Good luck with your decision.
Go to wherever you pay the LEAST and get the most scholarships. Grades is what matters, not really undergrad (as far as Temple goes). There are many from both schools here in my class.